Published Online:November 2025
Product Name:The IUP Journal of Mechanical Engineering
Product Type:Article
Product Code:IJME041125
DOI:10.71329/IUPJMECH/2025.18.4.60-71
Author Name:D H Pachchinavar, Hamza Abdul Quadeer Mohammed, Mohammed Khaja Moin Uddin and Shaik Abdul Ateeq
Availability:YES
Subject/Domain:Engineering
Download Format:PDF
Pages:60-71
This study focuses on analyzing the deformation and stress response of sandwich panels emphasis hybrid composite face sheets with two different core geometries corrugated and flat cores under static loading conditions. The hybrid face sheet was developed using epoxy resin (elastic modulus E 3 GPa) as the matrix, short glass fibers (E 70 GPa) for crack resistance, and SS304 wires (E 193 GPa, diameter 0.33 mm) as unidirectional stiffeners to enhance flexural rigidity and energy absorption. The total sample thickness was 6 mm, consisting of 1 mm face sheets on either side and a 4 mm core. The geometries were modeled using CATIA V5 and analyzed using ANSYS Workbench 16.0. The corrugated core (model 1) had a height of 10 mm, amplitude of 5 mm, and wavelength of 20 mm, while the flat core (model 2) had a uniform thickness of 4 mm. Under a centrally applied static load simulating three-point bending, model 1 shown a maximum total deformation of 3.89 mm, whereas model 2 recorded a higher deformation of 5.41 mm. Stress distribution in model 1 showed efficient load transfer through the sinusoidal core without significant concentration points. Model 2 showed a smoother, uniform sagging profile ideal for static load for bearing applications, though limited by contact stiffness imbalance. The study confirms that corrugated panels offer 28% lower deformation compared to flat cores, indicating a higher stiffness-to-weight ratio.
Composite sandwiched structures comprising two different composite plates and a lightweight core have been commonly applied in aerospace, auto sector, marine, and other engineering applications due to their greater specific stiffness, specific strength and multifunctionality (Khalil et al., 2024; Shahbazi and Zeinedini, 2020); e.g., high electromagnetic, stealth properties, thermal transport, energy absorption, etc.